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    Subject[PATCH 3/14] add new DVB-T frontend driver
    Date
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    - [DVB] add new DVB-T frontend driver sp887x.c
    diff -uNrwB --new-file xx-linux-2.6.0-test5/drivers/media/dvb/frontends/Makefile linux-2.6.0-test5/drivers/media/dvb/frontends/Makefile
    --- xx-linux-2.6.0-test5/drivers/media/dvb/frontends/Makefile 2003-09-10 11:28:54.000000000 +0200
    +++ linux-2.6.0-test5/drivers/media/dvb/frontends/Makefile 2003-09-09 09:24:21.000000000 +0200
    @@ -15,3 +15,4 @@
    obj-$(CONFIG_DVB_MT312) += mt312.o
    obj-$(CONFIG_DVB_VES1820) += ves1820.o
    obj-$(CONFIG_DVB_TDA1004X) += tda1004x.o
    +obj-$(CONFIG_DVB_SP887X) += sp887x.o
    diff -uNrwB --new-file xx-linux-2.6.0-test5/drivers/media/dvb/frontends/sp887x.c linux-2.6.0-test5/drivers/media/dvb/frontends/sp887x.c
    --- xx-linux-2.6.0-test5/drivers/media/dvb/frontends/sp887x.c 1970-01-01 01:00:00.000000000 +0100
    +++ linux-2.6.0-test5/drivers/media/dvb/frontends/sp887x.c 2003-09-07 17:40:35.000000000 +0200
    @@ -0,0 +1,610 @@
    +
    +#include <linux/module.h>
    +#include <linux/init.h>
    +#include <linux/i2c.h>
    +
    +#include "dvb_frontend.h"
    +#include "dvb_compat.h"
    +
    +
    +#if 0
    +#define dprintk(x...) printk(x)
    +#else
    +#define dprintk(x...)
    +#endif
    +
    +#if 0
    +#define LOG(dir,addr,buf,len) \
    + do { \
    + int i; \
    + printk("%s (%02x):", dir, addr & 0xff); \
    + for (i=0; i<len; i++) \
    + printk(" 0x%02x,", buf[i] & 0xff); \
    + printk("\n"); \
    + } while (0)
    +#else
    +#define LOG(dir,addr,buf,len)
    +#endif
    +
    +
    +static
    +struct dvb_frontend_info sp887x_info = {
    + .name = "Microtune MT7072DTF",
    + .type = FE_OFDM,
    + .frequency_min = 50500000,
    + .frequency_max = 858000000,
    + .frequency_stepsize = 166666,
    + .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
    + FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
    + FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_RECOVER
    +};
    +
    +
    +
    +static
    +int i2c_writebytes (struct dvb_frontend *fe, u8 addr, u8 *buf, u8 len)
    +{
    + struct dvb_i2c_bus *i2c = fe->i2c;
    + struct i2c_msg msg = { addr: addr, flags: 0, buf: buf, len: len };
    + int err;
    +
    + LOG("i2c_writebytes", msg.addr, msg.buf, msg.len);
    +
    + if ((err = i2c->xfer (i2c, &msg, 1)) != 1) {
    + printk ("%s: i2c write error (addr %02x, err == %i)\n",
    + __FUNCTION__, addr, err);
    + return -EREMOTEIO;
    + }
    +
    + return 0;
    +}
    +
    +
    +
    +static
    +int sp887x_writereg (struct dvb_frontend *fe, u16 reg, u16 data)
    +{
    + struct dvb_i2c_bus *i2c = fe->i2c;
    + u8 b0 [] = { reg >> 8 , reg & 0xff, data >> 8, data & 0xff };
    + struct i2c_msg msg = { .addr = 0x70, .flags = 0, .buf = b0, .len = 4 };
    + int ret;
    +
    + LOG("sp887x_writereg", msg.addr, msg.buf, msg.len);
    +
    + if ((ret = i2c->xfer(i2c, &msg, 1)) != 1) {
    + /**
    + * in case of soft reset we ignore ACK errors...
    + */
    + if (!(reg == 0xf1a && data == 0x000 &&
    + (ret == -EREMOTEIO || ret == -EFAULT)))
    + {
    + printk("%s: writereg error "
    + "(reg %03x, data %03x, ret == %i)\n",
    + __FUNCTION__, reg & 0xffff, data & 0xffff, ret);
    + return ret;
    + }
    + }
    +
    + return 0;
    +}
    +
    +
    +static
    +u16 sp887x_readreg (struct dvb_frontend *fe, u16 reg)
    +{
    + struct dvb_i2c_bus *i2c = fe->i2c;
    + u8 b0 [] = { reg >> 8 , reg & 0xff };
    + u8 b1 [2];
    + int ret;
    + struct i2c_msg msg[] = {{ .addr = 0x70, .flags = 0, .buf = b0, .len = 2 },
    + { .addr = 0x70, .flags = I2C_M_RD, .buf = b1, .len = 2 }};
    +
    + LOG("sp887x_readreg (w)", msg[0].addr, msg[0].buf, msg[0].len);
    + LOG("sp887x_readreg (r)", msg[1].addr, msg[1].buf, msg[1].len);
    +
    + if ((ret = i2c->xfer(i2c, msg, 2)) != 2)
    + printk("%s: readreg error (ret == %i)\n", __FUNCTION__, ret);
    +
    + return (((b1[0] << 8) | b1[1]) & 0xfff);
    +}
    +
    +
    +static
    +void sp887x_microcontroller_stop (struct dvb_frontend *fe)
    +{
    + sp887x_writereg(fe, 0xf08, 0x000);
    + sp887x_writereg(fe, 0xf09, 0x000);
    +
    + /* microcontroller STOP */
    + sp887x_writereg(fe, 0xf00, 0x000);
    +}
    +
    +
    +static
    +void sp887x_microcontroller_start (struct dvb_frontend *fe)
    +{
    + sp887x_writereg(fe, 0xf08, 0x000);
    + sp887x_writereg(fe, 0xf09, 0x000);
    +
    + /* microcontroller START */
    + sp887x_writereg(fe, 0xf00, 0x001);
    +}
    +
    +
    +static
    +void sp887x_setup_agc (struct dvb_frontend *fe)
    +{
    + /* setup AGC parameters */
    + sp887x_writereg(fe, 0x33c, 0x054);
    + sp887x_writereg(fe, 0x33b, 0x04c);
    + sp887x_writereg(fe, 0x328, 0x000);
    + sp887x_writereg(fe, 0x327, 0x005);
    + sp887x_writereg(fe, 0x326, 0x001);
    + sp887x_writereg(fe, 0x325, 0x001);
    + sp887x_writereg(fe, 0x324, 0x001);
    + sp887x_writereg(fe, 0x318, 0x050);
    + sp887x_writereg(fe, 0x317, 0x3fe);
    + sp887x_writereg(fe, 0x316, 0x001);
    + sp887x_writereg(fe, 0x313, 0x005);
    + sp887x_writereg(fe, 0x312, 0x002);
    + sp887x_writereg(fe, 0x306, 0x000);
    + sp887x_writereg(fe, 0x303, 0x000);
    +}
    +
    +
    +#include "sp887x_firm.h"
    +
    +#define BLOCKSIZE 30
    +
    +/**
    + * load firmware and setup MPEG interface...
    + */
    +static
    +int sp887x_initial_setup (struct dvb_frontend *fe)
    +{
    + u8 buf [BLOCKSIZE];
    + int i;
    +
    + /* soft reset */
    + sp887x_writereg(fe, 0xf1a, 0x000);
    +
    + sp887x_microcontroller_stop (fe);
    +
    + printk ("%s: firmware upload... ", __FUNCTION__);
    +
    + /* setup write pointer to -1 (end of memory) */
    + /* bit 0x8000 in address is set to enable 13bit mode */
    + sp887x_writereg(fe, 0x8f08, 0x1fff);
    +
    + /* dummy write (wrap around to start of memory) */
    + sp887x_writereg(fe, 0x8f0a, 0x0000);
    +
    + for (i=0; i<sizeof(sp887x_firm); i+=BLOCKSIZE) {
    + int c = BLOCKSIZE;
    + int err;
    +
    + if (i+c > sizeof(sp887x_firm))
    + c = sizeof(sp887x_firm) - i;
    +
    + /* bit 0x8000 in address is set to enable 13bit mode */
    + /* bit 0x4000 enables multibyte read/write transfers */
    + /* write register is 0xf0a */
    + buf[0] = 0xcf;
    + buf[1] = 0x0a;
    +
    + memcpy(&buf[2], &sp887x_firm[i], c);
    +
    + if ((err = i2c_writebytes (fe, 0x70, buf, c+2)) < 0) {
    + printk ("failed.\n");
    + printk ("%s: i2c error (err == %i)\n", __FUNCTION__, err);
    + return err;
    + }
    + }
    +
    + /* don't write RS bytes between packets */
    + sp887x_writereg(fe, 0xc13, 0x001);
    +
    + /* suppress clock if (!data_valid) */
    + sp887x_writereg(fe, 0xc14, 0x000);
    +
    + /* setup MPEG interface... */
    + sp887x_writereg(fe, 0xc1a, 0x872);
    + sp887x_writereg(fe, 0xc1b, 0x001);
    + sp887x_writereg(fe, 0xc1c, 0x000); /* parallel mode (serial mode == 1) */
    + sp887x_writereg(fe, 0xc1a, 0x871);
    +
    + /* ADC mode, 2 for MT8872, 3 for SP8870/SP8871 */
    + sp887x_writereg(fe, 0x301, 0x002);
    +
    + sp887x_setup_agc(fe);
    +
    + /* bit 0x010: enable data valid signal */
    + sp887x_writereg(fe, 0xd00, 0x010);
    + sp887x_writereg(fe, 0x0d1, 0x000);
    +
    + printk ("done.\n");
    + return 0;
    +};
    +
    +
    +/**
    + * returns the actual tuned center frequency which can be used
    + * to initialise the AFC registers
    + */
    +static
    +int tsa5060_setup_pll (struct dvb_frontend *fe, int freq)
    +{
    + u8 cfg, cpump, band_select;
    + u8 buf [4];
    + u32 div;
    +
    + div = (36000000 + freq + 83333) / 166666;
    + cfg = 0x88;
    +
    + cpump = freq < 175000000 ? 2 : freq < 390000000 ? 1 :
    + freq < 470000000 ? 2 : freq < 750000000 ? 2 : 3;
    +
    + band_select = freq < 175000000 ? 0x0e : freq < 470000000 ? 0x05 : 0x03;
    +
    + buf [0] = (div >> 8) & 0x7f;
    + buf [1] = div & 0xff;
    + buf [2] = ((div >> 10) & 0x60) | cfg;
    + buf [3] = cpump | band_select;
    +
    + /* open i2c gate for PLL message transmission... */
    + sp887x_writereg(fe, 0x206, 0x001);
    + i2c_writebytes(fe, 0x60, buf, 4);
    + sp887x_writereg(fe, 0x206, 0x000);
    +
    + return (div * 166666 - 36000000);
    +}
    +
    +
    +
    +static
    +int configure_reg0xc05 (struct dvb_frontend_parameters *p, u16 *reg0xc05)
    +{
    + int known_parameters = 1;
    +
    + *reg0xc05 = 0x000;
    +
    + switch (p->u.ofdm.constellation) {
    + case QPSK:
    + break;
    + case QAM_16:
    + *reg0xc05 |= (1 << 10);
    + break;
    + case QAM_64:
    + *reg0xc05 |= (2 << 10);
    + break;
    + case QAM_AUTO:
    + known_parameters = 0;
    + break;
    + default:
    + return -EINVAL;
    + };
    +
    + switch (p->u.ofdm.hierarchy_information) {
    + case HIERARCHY_NONE:
    + break;
    + case HIERARCHY_1:
    + *reg0xc05 |= (1 << 7);
    + break;
    + case HIERARCHY_2:
    + *reg0xc05 |= (2 << 7);
    + break;
    + case HIERARCHY_4:
    + *reg0xc05 |= (3 << 7);
    + break;
    + case HIERARCHY_AUTO:
    + known_parameters = 0;
    + break;
    + default:
    + return -EINVAL;
    + };
    +
    + switch (p->u.ofdm.code_rate_HP) {
    + case FEC_1_2:
    + break;
    + case FEC_2_3:
    + *reg0xc05 |= (1 << 3);
    + break;
    + case FEC_3_4:
    + *reg0xc05 |= (2 << 3);
    + break;
    + case FEC_5_6:
    + *reg0xc05 |= (3 << 3);
    + break;
    + case FEC_7_8:
    + *reg0xc05 |= (4 << 3);
    + break;
    + case FEC_AUTO:
    + known_parameters = 0;
    + break;
    + default:
    + return -EINVAL;
    + };
    +
    + if (known_parameters)
    + *reg0xc05 |= (2 << 1); /* use specified parameters */
    + else
    + *reg0xc05 |= (1 << 1); /* enable autoprobing */
    +
    + return 0;
    +}
    +
    +
    +/**
    + * estimates division of two 24bit numbers,
    + * derived from the ves1820/stv0299 driver code
    + */
    +static
    +void divide (int n, int d, int *quotient_i, int *quotient_f)
    +{
    + unsigned int q, r;
    +
    + r = (n % d) << 8;
    + q = (r / d);
    +
    + if (quotient_i)
    + *quotient_i = q;
    +
    + if (quotient_f) {
    + r = (r % d) << 8;
    + q = (q << 8) | (r / d);
    + r = (r % d) << 8;
    + *quotient_f = (q << 8) | (r / d);
    + }
    +}
    +
    +
    +static
    +void sp887x_correct_offsets (struct dvb_frontend *fe,
    + struct dvb_frontend_parameters *p,
    + int actual_freq)
    +{
    + static const u32 srate_correction [] = { 1879617, 4544878, 8098561 };
    + int bw_index = p->u.ofdm.bandwidth - BANDWIDTH_8_MHZ;
    + int freq_offset = actual_freq - p->frequency;
    + int sysclock = 61003; //[kHz]
    + int ifreq = 36000000;
    + int freq;
    + int frequency_shift;
    +
    + if (p->inversion == INVERSION_ON)
    + freq = ifreq - freq_offset;
    + else
    + freq = ifreq + freq_offset;
    +
    + divide(freq / 333, sysclock, NULL, &frequency_shift);
    +
    + if (p->inversion == INVERSION_ON)
    + frequency_shift = -frequency_shift;
    +
    + /* sample rate correction */
    + sp887x_writereg(fe, 0x319, srate_correction[bw_index] >> 12);
    + sp887x_writereg(fe, 0x31a, srate_correction[bw_index] & 0xfff);
    +
    + /* carrier offset correction */
    + sp887x_writereg(fe, 0x309, frequency_shift >> 12);
    + sp887x_writereg(fe, 0x30a, frequency_shift & 0xfff);
    +}
    +
    +
    +static
    +int sp887x_setup_frontend_parameters (struct dvb_frontend *fe,
    + struct dvb_frontend_parameters *p)
    +{
    + int actual_freq, err;
    + u16 val, reg0xc05;
    +
    + if (p->u.ofdm.bandwidth != BANDWIDTH_8_MHZ &&
    + p->u.ofdm.bandwidth != BANDWIDTH_7_MHZ &&
    + p->u.ofdm.bandwidth != BANDWIDTH_6_MHZ)
    + return -EINVAL;
    +
    + if ((err = configure_reg0xc05(p, &reg0xc05)))
    + return err;
    +
    + sp887x_microcontroller_stop(fe);
    +
    + actual_freq = tsa5060_setup_pll(fe, p->frequency);
    +
    + /* read status reg in order to clear pending irqs */
    + sp887x_readreg(fe, 0x200);
    +
    + sp887x_correct_offsets(fe, p, actual_freq);
    +
    + /* filter for 6/7/8 Mhz channel */
    + if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
    + val = 2;
    + else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
    + val = 1;
    + else
    + val = 0;
    +
    + sp887x_writereg(fe, 0x311, val);
    +
    + /* scan order: 2k first = 0, 8k first = 1 */
    + if (p->u.ofdm.transmission_mode == TRANSMISSION_MODE_2K)
    + sp887x_writereg(fe, 0x338, 0x000);
    + else
    + sp887x_writereg(fe, 0x338, 0x001);
    +
    + sp887x_writereg(fe, 0xc05, reg0xc05);
    +
    + if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
    + val = 2 << 3;
    + else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
    + val = 3 << 3;
    + else
    + val = 0 << 3;
    +
    + /* enable OFDM and SAW bits as lock indicators in sync register 0xf17,
    + * optimize algorithm for given bandwidth...
    + */
    + sp887x_writereg(fe, 0xf14, 0x160 | val);
    + sp887x_writereg(fe, 0xf15, 0x000);
    +
    + sp887x_microcontroller_start(fe);
    + return 0;
    +}
    +
    +
    +static
    +int sp887x_ioctl (struct dvb_frontend *fe, unsigned int cmd, void *arg)
    +{
    + switch (cmd) {
    + case FE_GET_INFO:
    + memcpy (arg, &sp887x_info, sizeof(struct dvb_frontend_info));
    + break;
    +
    + case FE_READ_STATUS:
    + {
    + u16 snr12 = sp887x_readreg(fe, 0xf16);
    + u16 sync0x200 = sp887x_readreg(fe, 0x200);
    + u16 sync0xf17 = sp887x_readreg(fe, 0xf17);
    + fe_status_t *status = arg;
    +
    + *status = 0;
    +
    + if (snr12 > 0x00f)
    + *status |= FE_HAS_SIGNAL;
    +
    + //if (sync0x200 & 0x004)
    + // *status |= FE_HAS_SYNC | FE_HAS_CARRIER;
    +
    + //if (sync0x200 & 0x008)
    + // *status |= FE_HAS_VITERBI;
    +
    + if ((sync0xf17 & 0x00f) == 0x002) {
    + *status |= FE_HAS_LOCK;
    + *status |= FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_CARRIER;
    + }
    +
    + if (sync0x200 & 0x001) { /* tuner adjustment requested...*/
    + int steps = (sync0x200 >> 4) & 0x00f;
    + if (steps & 0x008)
    + steps = -steps;
    + dprintk("sp887x: implement tuner adjustment (%+i steps)!!\n",
    + steps);
    + }
    +
    + break;
    +
    + }
    +
    + case FE_READ_BER:
    + {
    + u32* ber = arg;
    + *ber = (sp887x_readreg(fe, 0xc08) & 0x3f) |
    + (sp887x_readreg(fe, 0xc07) << 6);
    + sp887x_writereg(fe, 0xc08, 0x000);
    + sp887x_writereg(fe, 0xc07, 0x000);
    + if (*ber >= 0x3fff0)
    + *ber = ~0;
    + break;
    +
    + }
    +
    + case FE_READ_SIGNAL_STRENGTH: // FIXME: correct registers ?
    + {
    + u16 snr12 = sp887x_readreg(fe, 0xf16);
    + u32 signal = 3 * (snr12 << 4);
    + *((u16*) arg) = (signal < 0xffff) ? signal : 0xffff;
    + break;
    + }
    +
    + case FE_READ_SNR:
    + {
    + u16 snr12 = sp887x_readreg(fe, 0xf16);
    + *(u16*) arg = (snr12 << 4) | (snr12 >> 8);
    + break;
    + }
    +
    + case FE_READ_UNCORRECTED_BLOCKS:
    + {
    + u32 *ublocks = (u32 *) arg;
    + *ublocks = sp887x_readreg(fe, 0xc0c);
    + if (*ublocks == 0xfff)
    + *ublocks = ~0;
    + break;
    + }
    +
    + case FE_SET_FRONTEND:
    + return sp887x_setup_frontend_parameters(fe, arg);
    +
    + case FE_GET_FRONTEND: // FIXME: read known values back from Hardware...
    + break;
    +
    + case FE_SLEEP:
    + /* tristate TS output and disable interface pins */
    + sp887x_writereg(fe, 0xc18, 0x000);
    + break;
    +
    + case FE_INIT:
    + if (fe->data == NULL) { /* first time initialisation... */
    + fe->data = (void*) ~0;
    + sp887x_initial_setup (fe);
    + }
    + /* enable TS output and interface pins */
    + sp887x_writereg(fe, 0xc18, 0x00d);
    + break;
    +
    + default:
    + return -EOPNOTSUPP;
    + };
    +
    + return 0;
    +}
    +
    +
    +
    +static
    +int sp887x_attach (struct dvb_i2c_bus *i2c)
    +{
    + struct i2c_msg msg = { addr: 0x70, flags: 0, buf: NULL, len: 0 };
    +
    + dprintk ("%s\n", __FUNCTION__);
    +
    + if (i2c->xfer (i2c, &msg, 1) != 1)
    + return -ENODEV;
    +
    + dvb_register_frontend (sp887x_ioctl, i2c, NULL, &sp887x_info);
    +
    + return 0;
    +}
    +
    +
    +static
    +void sp887x_detach (struct dvb_i2c_bus *i2c)
    +{
    + dprintk ("%s\n", __FUNCTION__);
    + dvb_unregister_frontend (sp887x_ioctl, i2c);
    +}
    +
    +
    +static
    +int __init init_sp887x (void)
    +{
    + dprintk ("%s\n", __FUNCTION__);
    + return dvb_register_i2c_device (NULL, sp887x_attach, sp887x_detach);
    +}
    +
    +
    +static
    +void __exit exit_sp887x (void)
    +{
    + dprintk ("%s\n", __FUNCTION__);
    + dvb_unregister_i2c_device (sp887x_attach);
    +}
    +
    +
    +module_init(init_sp887x);
    +module_exit(exit_sp887x);
    +
    +
    +MODULE_DESCRIPTION("sp887x DVB-T demodulator driver");
    +MODULE_LICENSE("GPL");
    +
    +
    -
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